Again, "DNN" is a fairly broad term.

The closest thing that comes to mind is the list of "Evoq Preferred Products" on the DNN Store. That designation only says that the products "work with Evoq products on all supported deployment platforms." and that you can have confidence that "the product meets quality standards and is sold by an established vendor."

The list of vendors is a good one. There are other very good vendors not on that list.

The "DNN Community" doesn't certify modules. In fact, as an open source product, DNN Platform isn't certified by anyone and, like most similar products, isn't warranted for anything other than what is stated in the license agreement.

But, the great thing about the DNN Community (and other similar communities) is that you can ask around, ask questions, and get a feeling as to which developers are trusted by the community at large.

And, as an example, two summers ago there was a fairly severe problem identified across a large number of modules and (if my memory is working) DNN itself. Products were pulled from the DNN Store, and security fixes were released. I use that example to make the point that the DNN Community (and also DNN Corp in that example) take such issue seriously.

If you have specific questions, please ask them in these forums. If you have security issues, please report them to the DNN security team. If you have bugs, suggestions, wish list items, etc. you can use GitHub to report them. That also includes processes. We can all help advance things, and getting actively involved is one of the best ways to do that.

I hope this helps.